20267109 has 6 divisors (see below), whose sum is σ = 29274726. Its totient is φ = 13511400.

The previous prime is 20267101. The next prime is 20267119. The reversal of 20267109 is 90176202.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 44100 = 4497^2 + 210^2 .

It is not a de Polignac number, because 20267109 - 2³ = 20267101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20267101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1125942 + ... + 1125959.

It is an arithmetic number, because the mean of its divisors is an integer number (4879121).

Almost surely, 2^20267109 is an apocalyptic number.

It is an amenable number.

20267109 is a deficient number, since it is larger than the sum of its proper divisors (9007617).

20267109 is a wasteful number, since it uses less digits than its factorization.

20267109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251907 (or 2251904 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20267109 is about 4501.9005986361. The cubic root of 20267109 is about 272.6448305661.

The spelling of 20267109 in words is "twenty million, two hundred sixty-seven thousand, one hundred nine".